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Method for extracting rubidium chloride from rubidium-containing high-salt brine

A rubidium chloride and brine technology, applied in chemical instruments and methods, rubidium/cesium/francium compounds, inorganic chemistry, etc., can solve the problems of volume increase, increase the cost of recovering other salts in salt brine, etc., and reduce the cost of follow-up treatment Effect

Active Publication Date: 2021-01-19
INST OF RESOURCES COMPREHENSIVE UTILIZATION GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the effective separation of rubidium and potassium, the existing method often uses a large amount of washing water, which increases the volume of the raffinate during the fractionation extraction process due to the incorporation of washing water, which increases the cost of subsequent recovery of other salts in the brine

Method used

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  • Method for extracting rubidium chloride from rubidium-containing high-salt brine

Examples

Experimental program
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Effect test

Embodiment 1

[0046] use figure 1 The process flow shown is to extract rubidium from a certain sintered mineral leach solution (ie high potassium salt brine containing rubidium), and its main metal components are shown in Table 1.

[0047] Table 1 Main metal components of sintered mineral leachate

[0048] Element Rb Cs K Na Cu Zn Content (g / L) 3.74 0.40 142.42 50.13 3.25 1.27

[0049] In the present embodiment, the method for extracting rubidium chloride from rubidium-containing high-salt brine, the steps are as follows:

[0050] S1: Add KOH to the rubidium-containing high-potassium salt brine (ie sintered mineral leachate), adjust the pH value of the rubidium-containing high-potassium salt brine to 10, let it stand for 2 hours, precipitate metal ions, and filter to remove the metal Ion precipitation to obtain a purified solution;

[0051] S2: adding KOH to the purification solution obtained in step S1, adjusting the pH value of the purification solut...

Embodiment 2

[0067] use figure 1 The process flow shown is to extract rubidium in a certain solid waste leach solution (ie high potassium salt brine containing rubidium), and its main metal components are shown in Table 5.

[0068] Table 5 Main metal components of solid waste leachate

[0069] Element Rb Cs K Na Cu Zn Pb Content (g / L) 2.74 0.005 102.21 23.16 1.90 10.02 1.20

[0070] In the present embodiment, the method for extracting rubidium chloride from rubidium-containing high-salt brine, the steps are as follows:

[0071] S1: Add KOH to the rubidium-containing high-potassium salt brine (i.e. solid waste leaching solution), adjust the pH value of the rubidium-containing high-potassium salt brine to 10, let it stand for 2 hours, precipitate metal ion precipitates, and filter to remove the metal Ion precipitation to obtain a purified solution;

[0072] S2: adding KOH to the purification solution obtained in step S1, adjusting the pH value of the...

Embodiment 3

[0088] use figure 1 The process flow shown is to extract rubidium in a simulated rubidium-containing high-potassium salt lake water (ie, rubidium-containing high-potassium salt brine), and its main metal components are shown in Table 9.

[0089] Table 9 The main metal components of simulated rubidium-containing high-potassium salt lake water

[0090] Element Rb Cs K Na Li Mg Content (g / L) 0.21 0.002 27.72 96.95 6.85 28.38

[0091] In the present embodiment, the method for extracting rubidium chloride from rubidium-containing high-salt brine, the steps are as follows:

[0092] S1: Add KOH to the rubidium-containing high-potassium salt brine (that is, the simulated rubidium-containing high-potassium salt lake water), adjust the pH value of the rubidium-containing high-potassium salt brine to 10, let stand for 2 hours, precipitate metal ions, and filter removing the metal ion precipitate to obtain a purified solution;

[0093] S2: adding KOH...

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Abstract

The invention relates to the technical field of rubidium separation and purification, and particularly discloses a method for extracting rubidium chloride from rubidium-containing high-salt brine. Themethod comprises the following steps: firstly, adding inorganic alkali into rubidium-containing high-salt brine in stages to precipitate metal ion impurities such as copper, lead, zinc and magnesiumin the rubidium-containing high-salt brine, and adjusting the pH value of the high-salt brine to 13-14; and then, carrying out multistage extraction-washing-reverse extraction treatment on the high-salt brine by using 4-tert-butyl-2-(alpha-methyl benzyl) phenol as an extracting agent and sulfonated kerosene as a diluent to obtain a reverse extraction solution containing rubidium chloride, and carrying out precipitation, calcination and re-crystallization treatment on the reverse extraction solution to obtain a high-purity rubidium chloride product. Tests prove that rubidium can be extracted and purified from rubidium-containing high-salt brine by the method, and the volume of raffinate in the extraction process is not increased on the premise of ensuring the rubidium separation effect andrecovery rate, so that the subsequent treatment cost of the brine is reduced.

Description

technical field [0001] The invention relates to the technical field of separation and purification of rubidium, in particular to a method for extracting rubidium chloride from high-salt brine containing rubidium. Background technique [0002] Rubidium is a rare alkali metal element widely used in optical glass, thermoelectric generators, atomic clocks, solar cells, medicine and other fields. The content of rubidium in the earth's crust is about 0.028%, which is not low but extremely scattered. So far, no pure rubidium mineral has been found, but exists in other minerals such as mica, cesium garnet, and halides containing cesium, lithium, and potassium. Therefore, it can only be extracted as a by-product, resulting in its scarcity. [0003] The separation and purification of rubidium is a challenging task, because the associated alkali metal elements have very similar physical and chemical properties. The earliest in the prior art is to use the chloroplatinic acid precipita...

Claims

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Application Information

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IPC IPC(8): C01D17/00
CPCC01D17/00C01P2006/80Y02P10/20
Inventor 刘勇吕先谨阳永明吕建芳马致远王彦基陈志强杨庆先周吉奎
Owner INST OF RESOURCES COMPREHENSIVE UTILIZATION GUANGDONG ACAD OF SCI
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